Irregularly shaped, dull orangish tan cap; spines or "teeth" on the underside. Grows on the ground in mixed woods. July–November. Cap convex, becoming flat with a central depression; orangish tan; texture fairly smooth; margin curves in at first, becoming wavy; flesh is white, bruising ocher. Underside pale yellowish white, bruising ocher; covered with spines or “teeth” that descend the stalk. Stalk straight; pale yellowish white; smooth; often off-center. Spore print white. Spores magnified are round, smooth, colorless. The hedgehog is easy to identify because of the spines or “teeth” on the underside of the cap.
Lookalikes: Chanterelles (Cantharellus spp.) do not have “teeth” on their undersides. Another fungus, Hericium erinaceus or "bearded tooth," is also sometimes called "hedgehog"; although it too has spines (or "teeth"), it looks very different: It is a beardlike whitish mass and grows on wood.